Adjustable school-desk



(No Model.) Y

W. P. SPIETH.

ADJUSTABLE SCHOOL DESK.

No. 590,076. Patented Sept. 14,1897;

TATES IVILLIAM F. SPIETI'I, OF CLEVELAND, OHIO.

ADJUSTABLE SCHOOL-DESK.

SPECIFICATION forming part of Letters Patent No. 590,076, datedSeptember 14, 1897.

Applicati n filed Novem'ber 16,1896. Serial No. 612,393. (No model.)

To all whom it may concern.-

Be it known that I, WVILLIAM F. SPIETH, a citizen of the United States,residing at Cleveland, in the county of Ouyahoga and State of Ohio, haveinvented certain new and useful Improvements in Adjustable School-Desks;and I do hereby declare the followingto be a full, clear, and exactdescription of the invention, such as will enable others skilled'in theart to which it appertains to make and use the same.

The object of my invention is to provide a cheap adjustable desk whichmay be easily and quickly raised or lowered on both sides simultaneouslythrough a wide range and secured at any desired point.

The invention consists in the construction and combination of partshereinafter described and claimed.

In the drawings, Figure 1 is a perspective view of my improved desk; andFigs. 2, 3, and 4 are enlarged sectional views of the desk standard andhousing, taken on the lines 2 2, 3 3, and 4 4E, respectively.

Referring to the parts by letters, A represents the floor-standards.These standards consist of a vertical housing a, through which the stemof the desk-standard passes, and two diverging legs a, which extendequally in front of and behind said housing. Centrallyplaced holes apass transversely through both housings, these holes being adapted topermit the passage of an operating-shaft (shown in dotted linesinFig. 1) and to furnish bearings for such shaft. Two set-screws a cscrew through one side of thehousing and imstems h of the desk-standardsare vertically movable through the housings a, and in each stemis formeda transverse vertical slot b which is in line with the holes (L -that isto say, the operating-shaft passing through the holes will pass throughthe slots. One verth cal wall of the slot is fashioned with rackteeth band the operating-shaft engages with these rack-teeth 011 bothstems,wherefore both sides of the desk may be simultaneously moved up ordown.

In the upper end of the stem at the point where the arms join it are therecesses or depressions b b, in opposite sides thereof. The

foot 0 of a brace O fits into the recess in the inner face of the stem,(5 for example,) and is secured thereto by a screw or bolt, whichpassesthrough the stem and foot, its head lying in the other recess Z2From the foregoing description it will b seen that the deskstandards Bare also alike, and consequently interchangeable. To use the leftstandard on the right side, however, it is not necessary to turn itaround, as one must turn one of the floor-standards to use it on theopposite side.

The inner wall of each housing is transversely serrated, while bothsides of the stem are correspondingly serrated. By virtue of thisconstruction the serrated wall of the housing will be in contact with aserrated side of the stem whether the desk-support be used upon one sideor the other of the desk. The set-screws a by pressing against the stemsforce these serrated surfaces into contact, and thus prevent anyslipping of the stems.

Having described my invention, I claim 1. In an adjustable desk, thecombination of two floor-standards, each consisting of a housing and twodiverging legs, said housings having transverse holes for the receptionof an operatingshaft, with two desk-standards each consisting of a stemwhich is movable up and down through the corresponding housing, and hasat its upper end diverging arms whereby it is adapted to be secured to adeskbody, each stein being substantially an L beam having a longitudinalslot through-its web and rack-teeth on one edge of the slot, and twoset-screws screwing through said housing and bearing against the web ,ofsaid I-beams between the flanges thereof and the said slot therein,substantially as described.

2. In an adjustable desk, the combination of two floor-standards, eachconsisting of two inclined legs and a vertical housing with which theupper ends are integrallyconnect ed, said housing having transverseholes for the passage of an operating-shaft, with the desk-standards,consisting of a stem and two diverging arms on the upper end of thestern, said stem having a vertical slot one wall of which is providedwith rack-teeth, a brace secured to the upper end of each stem, and adesk secured to the said arms and braces, substantially as and for thepurpose specified.

3. In an adjustable desk, the combination of the two floor-standards,each consisting of a vertical housing at its upper end, and two legswhich project equally in front of and behind said housing, said housinghaving the holes through their side walls, with the deskstandards, eachconsisting of a vertical stem, and two arms for connection with thedesk, the said stem having a transverse vertical slot and rack-teeth onone side of said slot, the standard being provided at its upper end withrecesses on both sides to receive the foot of a brace, substantially asand for the purpose specified.

4:. In an adjustable desk, the combination of two floor-standards, eachconsisting of a vertical housing, and two diverging legs, said housinghaving transverse holes through both side walls, and interior horizontalserrations on one side wall, and two set-screws which screw through theother side wall, with two desk-standards, each consisting of a stem andtwo diverging arms 011 its upper end, said stem having a transversevertical slot wit-h rack-teeth on one edge, and horizontal serrations onboth side faces of the stem, substantially as and for the purposespecified.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM F. SPIETII.

lVitnesses: I

E. L. THURsToN, E. B. GILCHRIST.

